```{index} single: cv_name_hek; B function ``` ```{index} single: B::cv_name_hek; Perl function ``` # cv_name_hek Return the CV's name when it was stored as a HEK rather than via a GV. ## Synopsis ```perl my $name = $cv->NAME_HEK; # undef unless CVf_NAMED is set ``` Modern perl stores some sub names directly in a hash-key slot on the CV (cheaper than a full GV). If the CV does not use that slot, returns `undef`; callers generally fall back to `$cv->GV->NAME`.